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. Author manuscript; available in PMC: 2018 Sep 6.

Published in final edited form as: World Med Health Policy. 2018 Mar 12;10(1):7–54. doi: 10.1002/wmh3.257

Figure 5. — Relationships Between Air Pollution and Hypertensive Disorders of Pregnancy (HDP), Stratified by Race/Ethnicity and Education Categories.

^aAdjusting for interquartile range (IQR) zipcode level pollutant, maternal age, number of cigarettes smoked during pregnancy, nulliparity, race/ethnicity, season of birth, year of conception from hospital-based records. ^bThe IQR for O₃ was 16.9 ppb, for PM_2.5 was 4.0 μg/m³, and for PM₁₀ was 7.7 μg/m³ during first trimester. ^cAdjusting for IQR pollution, maternal age, maternal education category, smoking, race/ethnicity, marital status, prenatal care, season of conception, census tract median household income. ^dThe IQR for O₃ was 30 ppb, and for PM_2.5 was 0.67 μg/m³ during entire pregnancy.

Figure 5. — Relationships Between Air Pollution and Hypertensive Disorders of Pregnancy (HDP), Stratified by Race/Ethnicity and Education Categories.

^aAdjusting for interquartile range (IQR) zipcode level pollutant, maternal age, number of cigarettes smoked during pregnancy, nulliparity, race/ethnicity, season of birth, year of conception from hospital-based records. ^bThe IQR for O₃ was 16.9 ppb, for PM_2.5 was 4.0 μg/m³, and for PM₁₀ was 7.7 μg/m³ during first trimester. ^cAdjusting for IQR pollution, maternal age, maternal education category, smoking, race/ethnicity, marital status, prenatal care, season of conception, census tract median household income. ^dThe IQR for O₃ was 30 ppb, and for PM_2.5 was 0.67 μg/m³ during entire pregnancy.